桂林理工大学学报2016，Vol.36Issue(4)：731-737,7.DOI:10.3969/j.issn.1674-9057.2016.04.014
高速列车在高架桥软土地基段引起的地面振动监测分析
Test and analysis of soft ground vibration induced by high-speed trains on viaduct
摘要
Abstract
In soft soil area,the ground vibration induced by high-speed train on viaduct is widely concerned.Since the Pearl River Delta is abundant of soft soil,high-speed railway is often constructed in the form of viaduct.In order to understand the vibration characteristics of soft soil and the attenuation rule of the vibration wave propagating in soft soil,triaxial vibration monitoring was made on the soft soil foundation of the GuangShen intercity high-speed train.The results show that the dominant frequency of the ground vibration is 5-60 Hz,the maximum value of each velocity component didn't appear at the same time.The variation of site conditions had large impacts on the triaxial vibration and more significant impact on the horizontal vibration.In this paper,vector sum of three axes vibration velocities was used instead of single velocity component for the vibration level formula (proposed by American Federal Railroad Administration).The result shows that the duration time of the vibration attenuate is slow like a funnel,which is more reasonable to reflect the characteristics of the ground vibration.关键词
软土地基/环境振动实测/高架桥/三分量/矢量合成Key words
soft foundation/environmental vibration measurement/viaduct/triaxial direction/vector synthesis分类
交通工程引用本文复制引用
曾平,林鹏威,林署炯,张澄博..高速列车在高架桥软土地基段引起的地面振动监测分析[J].桂林理工大学学报,2016,36(4):731-737,7.基金项目
广东省自然科学基金项目(S2013010012521) （S2013010012521）
